Areas of Expertise
MediFind evaluates expertise by pulling from factors such as number of articles a doctor has published in medical journals, participation in clinical trials, speaking at industry conferences, prescribing and referral patterns, and strength of connections with other experts in their field.
Learn more about MediFind’s expert tiers
Find Dr. Johnston's expertise for a condition
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- Distinguished
- Thoracic Aortic AneurysmDr. Johnston isDistinguished. Learn about Thoracic Aortic Aneurysm.
- Advanced
- Abdominal Aortic Aneurysm (AAA)Dr. Johnston isAdvanced. Learn about Abdominal Aortic Aneurysm (AAA).
- Familial Colorectal CancerDr. Johnston isAdvanced. Learn about Familial Colorectal Cancer.
- Mesenteric Venous ThrombosisDr. Johnston isAdvanced. Learn about Mesenteric Venous Thrombosis.
- Experienced
- Anal CancerDr. Johnston isExperienced. Learn about Anal Cancer.
- Anal FissureDr. Johnston isExperienced. Learn about Anal Fissure.
- AngioplastyDr. Johnston isExperienced. Learn about Angioplasty.
- Attenuated Familial Adenomatous PolyposisDr. Johnston isExperienced. Learn about Attenuated Familial Adenomatous Polyposis.
- Bowel IncontinenceDr. Johnston isExperienced. Learn about Bowel Incontinence.
- Colonic MalakoplakiaDr. Johnston isExperienced. Learn about Colonic Malakoplakia.
View All 31 Experienced Conditions
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